You sir are an outstanding teacher of mathematics and related courses. I have been teaching (students) mathematics for over 37 years and when I come across textbooks wherein you are hosting the video and/or DVD lectures, I look no further for math related materials; you are, as we say in Maine, “Top Shelf.

I, as well as other of my colleagues, integrate your excellent presentations into our classes. I'm very sure that our students have greatly benefited from your clear, precise, easy to understand explanations, and, that I have become a much better teacher as a result of your excellent work. I wish you a long and prosperous journey as you continue teaching and sharing your great gift with others, through media as well as live in the classroom. Thank you.

**I**found myself all caught up in it because it was actually making so much sense. After a half hour one of kids said, "Mom, what are you doing, you hate math!". It was just making so much sense I was actually enjoying it. No exaggeration. I am so pleased. So I have decided to switch two of my sons over to Chalk Dust.